This equation is called the continuity equation for steady ... A streamline is a line that is tangential to the instantaneous velocity direction (velocity is a vector, and it has a magnitude and a ...

To find an estimate of the speed after 6.5 seconds, draw the tangent to the curve at 6.5. \(\text{Gradient} = \frac{140 - 20}{9 - 4} = \frac{120}{5} = 24 \:\text{m/s}\) A velocity-time graph shows ...